On 26/11/13 09:01, Lee Nguyen wrote:
Hi,
Having attended a few PGCons, I've always heard the remark from a few
presenters and attendees that Postgres shouldn't be run inside a VM.
That bare metal is the only way to go.
Here at work we were entertaining the idea of running our Postgres
database on our VM farm alongside our application vm's. We are
planning to run a few Postgres synchronous replication nodes.
Why shouldn't we run Postgres in a VM? What are the downsides? Does
anyone have any metrics or benchmarks with the latest Postgres?
Thanks!
Lee Nguyen
I suspect that it is a performance and reliability issue that affects
any ACID database.
AFAIK, in a VM there is less certainty as to when a disk I/O is actually
complete and safely on the disk.
I think vm's are probably fine for testing, but not for production.
Cheers,
Gavin
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